code: def __init__(self, msg):
      super(HeartBeatException, self).__init__(msg)
  
file_path: metaflow/metaflow/metadata/heartbeat.py
imports: import time
  import requests
  import json
  from threading import Thread
  from metaflow.sidecar import MessageTypes, Message
  from metaflow.metaflow_config import SERVICE_HEADERS
  from metaflow.exception import MetaflowException
label_desc: Use image node_id 1 to create a new HeartBeatException object from inherited base classes: MetaflowException with example: obj = HeartBeatException(msg)